* Loss of power steering: Making steering extremely difficult, especially at low speeds.
* Overheating: The engine will overheat quickly without coolant circulation.
* Dead battery: The battery won't charge, leaving you stranded.
* No air conditioning: Obvious, but also a comfort issue, especially in hot weather.
Attempting to drive without a serpentine belt is extremely dangerous and will likely result in significant engine damage and leave you stranded.